TK 56433-5-MM-EN
33
Extended Life Coolant (ELC)
Chevron/Delo XLC is currently the only Extended Life
Coolant approved by Thermo King for use in these
units for five years or 12,000 hours:
N
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e:: The use of 50/50 percent pre-mixed Extended
Life Coolant (ELC) is recommended to assure
that de-ionized water is being used. If 100
percent full strength concentrate is used, de-
ionized or distilled water is recommended over
tap water to insure the integrity of the cooling
system is maintained.
Antifreeze Maintenance Procedure
As with all equipment containing antifreeze, periodic
inspection on a regular basis is required to verify the
condition of the antifreeze. Inhibitors become worn out
and must be replaced by changing the antifreeze.
Change ELC (red) engine coolant every five years or
12,000 hours (whichever occurs first).
Do not mix green or blue-green engine coolant with
ELC (red) engine coolant. See “Extended Life Coolant
(ELC)” for more information about ELC.
The factory recommends the use of a 50/50 antifreeze
mixture in all units even if they are not exposed to
freezing temperatures. This antifreeze mixture will
provide the required corrosion protection and
lubrication for the water pump.
Checking the Antifreeze
Check the solution concentration by using a
temperature compensated antifreeze hydrometer or a
refractometer (P/N 204-754) designed for testing
antifreeze. Maintain a minimum of 50 percent
permanent type antifreeze concentrate and 50 percent
water solution to provide protection to -30 F (-34 C). Do
not mix antifreeze stronger than 68 percent permanent
type coolant concentrate and 32 percent water for use
in extreme temperatures.
Changing the Antifreeze
1.
Run the engine until it is up to its normal operating
temperature. Stop the unit.
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CA
AU
UT
TIIO
ON
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2.
Open the engine block drain and completely drain
the coolant. Observe the coolant color. If the
coolant is dirty, proceed with steps a, b, and c.
Otherwise proceed to step 3.
a.
Run clear water into the radiator and allow it to
drain out of the block until it is clear.
b.
Close the block drain and install a commercially
available radiator and block flushing agent, and
operate the unit in accordance with instructions
of the flushing agent manufacturer.
C
CA
AU
UT
TIIO
ON
N
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Riisskk o
off IIn
njju
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A
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on
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c.
Open the engine block drain to drain the water
and flushing solution.
3.
Run clear water into the radiator, and allow it to
drain out of the block until it is clear.
4.
Inspect all hoses for deterioration and hose clamp
tightness. Replace if necessary.
5.
Loosen the water pump belt. Check the water
pump bearing for looseness.
6.
Inspect the radiator cap. Replace the cap if the
gasket shows any signs of deterioration.
7.
If using ELC concentrate, mix one gallon of ELC
concentrate and one gallon of de-ionized or distilled
water in a container to make a 50/50 mixture (Do
not add antifreeze and then water to the unit. This
procedure may not give a true 50/50 mixture
because the exact cooling system capacity may not
always be known).
8.
Refill the radiator with the 50/50 antifreeze mixture
and verify to bleed the air from the cooling system
as needed.
Bleeding Air from the Cooling System
Jiggle pin thermostats are original equipment on units
that have engines from the TK486 family of engines.
Jiggle pin thermostats make it unnecessary to bleed
the air out of the engine block because they keep air
from being trapped in the engine block. Normally, all
but about 1.5 qt (1.4 liters) of coolant drain out of the
cooling system when it is drained. If approximately half
of the Cooling System Capacity (see Specifications
Chapter) seems to fill the cooling system after it has
been drained, air has been trapped in the block. Bleed
the air out of the block using the following procedure:
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NO
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e a
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bllo
occkk..
